Update- apparently, our notices were not lost. But it took almost 4 weeks for them to show up! Well, my name was swapped as mom expected and I tried to submit eRequest for typo error but the system gave an error. Then I tried to reach out a representative through Emma and she said she cannot help and finally I called the call center and she submitted the form for me. They said once the mistake is indicated, it will be corrected on the case and other notices won’t have the same problem. Btw, I asked about bio appointments and they said it should be scheduled in 30 days after the receipt notice was mailed out.